WIth a gazillion Japanese who can pass for Korean, and vice versa, (for a variety of reasons going back millenia), not sure that question is meaningful.
Modern Koreans probably have a bit more Tibetan in their lines than the Japanese, and less Jomon, but they both have a touch of Hakka, and unless you have the really flat Moon face look, that's a pretty dominant "face" in both countries ~ except among the Emishi and Ainu.
Hard to stick out in that crowd!